Bills 2.5-turbo build, pic's of machined parts Options

[Bills914-4]

here's a few pic's of some parts I've been working on

1700 heads I've modified at work, from this


to this (machined step & groove), chamber porting was done
at home , needed more cc (61) to get compression down








custom 100mm JE pistons ( thank you Charles @ LN engineering)
machined piston crown pocket (9cc)

[Andyrew]

Awesome! Love turbos! What kind of power and boost pressures are you looking to run? I might be able to help with sizing. If your looking for full boost by say 2500 rpms you'll need to stick with a relatively small turbo, but you won't get the power out of it your looking for big numbers. 2.5 L is nice and should help with spool. I am a big proponent of go bigger turbo than you need and adjust boost pressure giving you headroom. It also helps keep IATs low if you go big turbo low boost.

The biggest thing you need to know is what kind of power you want to run and on what type of fuel. If you have E85 readily available then you should run that.

Also If you can fit it I would go air to water intercooler. That's what I have and it works really well. Not sure lot of room in a 914 for an air to air. Meth does help a lot.


Please note I don't have much T4 knowledge but a good amount of turbo knowledge.